import { INCREMENT, DECREMENT } from './constant';

const initState = 0;
export default function countReducer(preState = initState, action) {
    const { type, data } = action;

    switch (type) {
        case INCREMENT:
            return preState + data * 1;
        case DECREMENT:
            return preState - data * 1;
        default:
            console.log('为定义操作');
            return preState;
    }
}
